Hub scraper for tractor wheels



March 8, 1932.

H. H. FRAHM ET AL MUD SCRAPER FOR TRACTOR WHEELS Filed March 8, Y 1950 2 Shets-Sheet l All vllqvullvr Kb f gimen/coz March 8, 1932.

H. H. FRAHM ET AL 1,848,944 MUD scRAPER Foa TRACTOR WHEELS Filed March 8, 1930 2 Sheets-Sheet 2 .2' 5.. .v n s ,ZI-Z. D

Patented Mar. 8, 1932 Y HERMAN HENRY FRAHM ARTH MUD sorteren. non TRACTOR WHEELS Application led March 8,

This invention relates to means for scrap; ing mud from tractorwheels and particularly to a` scraper designed to work'between two series of traction wheel lugs.

a One of 'the `objects of the present invention is to provide al scraper adapted to be mounted on the fender of a tractor wheel and whichV is so constructed that itwill trip incase a i Y stoneor other obstruction is picked up by the lo wheel, anda further object isto provide a device ofthis character which will not, under these circumstances, cause undue strain on the fender. 1

A'urther object is to provide a scraper. which will trip on meeting anv obstruction in case lthe lwheel ino'ves reversely.

A further Objectis to yieldingly mount the scraper upon the fender so that when the scraper vmeets' an obstruction,fit will swing outward as well/as rnove to tripping position. Another object is to so connect the spring holding the scraper in itsworkingA position that when the scraperis tripped against the action of the spring,

the spring will exert no greater tensionV on the scraper than the ten` sion exert'e'l before the spring is tripped.

VOther objects will appear in theV course of the rfollowing description. Y

Qur invention is illustrated in the accompanying drawings, wherein Y 1 f AFigure 1 is an elevation of a portion of a fender.V anda traction 'wheel showingv our scraper applied thereto; y

Figure 2 ris a section on the line 2-2 of l*"1gure1;. c i' v` v Y Figure 3 is a section on the line 3-3 of Fig'- ure l; i 1

Figure 4e is'an vunder side plan viewr of the scraper itself, the lsupporting' angle irons be-v ng'shownin section; Figure 5 isa like vview to Figure 2, but on a smaller scale and-showingv fthe vmanner in which the scrap'er'trip's-whenstriking a rock. Referring to these drawingaidesignates the fender and'Bv portio'njof the` traction, wheelhavingthe' lu gs 'Z2 laterally sp acedy from each other. The scraperV is' hingedly mounted upon the fender A by'ithe provision ofa barV 10 which'isbo'lted to the i'ender and towhich" a 'crossba-r 11 is h'nged.; jExtending*down-AV tached means 1930. "seria/1 'N p. 434,362.

ward from this c ross bar thereto is a supporting bar diagonal brace'l attached to '12. VARiveted',

to thebar rigidly attached" to thel Un CARL' runnin', or ELMA. IOWA i 11 anarigiaiy boned 12 braced by a bolted or otherwise lower end of the'bar 12 is a plate 14 andjrearwardl of this plate are the downwardly extending space 15'. Between -these angle irons, of the scrapingl blade y17 shank 16 isyoscilla'tably 'transverse' *bolt or -pin 18. which extends through the anglefirons' 145.

d angle'irons the shank 16 c is disposed." lThe n iounted 'upon'the urges'the scraperv shank upward to the'position shownvjinrligure 2. VThe scraper shank 1s' ity as 'at'20 andthe scraper otherwise attached tol and Vextends downward A.: Thus there is no wear Vof the rscraping blade 1.7.

touch the wheel upon the' eXtrernit The Ahinged connection angled at its eiit'rernf toward, but .does not for the shankl to the pin 18 is ornied bythe hinge plate 21 Also hinged upon the section 22v which .is

v'which yis` riveted or `bolted tothe shankl and which is' bent around the pintle 18.

pintle 18 isthe shank end of the shank section 16. Embracing the shank section-22 is the in `orin and having the stirrup 23 U-shaped lower end otits legs connected by a transversepin 24 lsurrounding which is arollerl 25. Disposed `between theV under face. ofthe shank section22and this roller 25 is a slidable U-shapedstrip 26. The

yoke or stirrup 23 is connected byaneyebolt i contractile spring 2 8.

27 to a powerful, coiled The upperend of thisv spring is engaged by a bolt A nut'31 engages i uste d.

r29. passing through a to the'bar 12 adjacent Y the bolt 29 so thatby thisv the tension of the Asbeforeremarkei this spring bracket O atits f upper end.

spring may bev adthe bar 11 and 17 is riveted or. thisk angular portion Voverlapped by the rear f isrel'ativelypowerful' andvholds the scraper in Aits scraping.positionf 32and passing through A Attached to thejender transverse bar thisbar one'a'ch side.l 9

safely' preset-ins bolts against? washers 8 5' belts a'ndagainst atran sverse plate 3 6 which in turn bears against the longitudinal bar 12. Riveted to the bar 32 are angular irons 37 which extend outward one on each side oi the spring 28 and act to support the bar 12 from any lateral strain. The members 37 are attached to the bar 32 because this bar has a more rigid support than could ,begiven .to the hinge connection betweenthebar 10l and the bar 12.

Riveted to the angle irons 15 are two U- shaped .trame vbars 38 :one :leg-` .of each :bar being riveted to the angle irons 15 and each bar extending outward a-n'dthen `downward with a cross piece 39 riveted to the downwardly extending outer leg, thus'constituting astop forthe' extension..22 ofitheshank I16. Attachedtothe lowerendof the longitudinal :bar 12 4is v`an :angularlatch 40 Vwhich 4is dislposed.` between thefU-shapedirons .38.

It will ...be Vunderstood .that .under .ordinary circumstances, the `scraper.extends `inward .toward.the iwheel A,-.bnt in spaced relation .to theperiphery thereofl so that this vscraper will .act-:to scraperoifnny mnd .whichmay accumulate betiween .the 4series orf llugs, thus pireventing thertractive power-.ofthe wheelfrom .being l:reduced by the. mud. '.The :spring-.28 will hold thescraper ,in st-he`position :shown in"Figure2 and this springfisrstrong. .enough so. ,as .to practically ,hldthe .scraperrigi'dly in placerunless a,;stone or .otherfobstrnction shoiil'd. bridge Qbet-.ween thelugs i on the traction ,wheel aand. move upward .into engagement .with ther-scraper. lIr" .this occurs, the scraper will vmoveto the position shownin Figure. 5. 'This pressure ,onthe scraper will causethe ..scrape1anchthe 'bar =.12 e upon 'which itisniounted to swingvoutwardas shownlin Figure 5 iagainstftheaction of the springs 34, while the scraper .tilts .iipwardfto l permit :the

obstruction to pass. lt is to :benoted `trom Eignref that :the @roller-..25 will bear .against the llower face of .the `iron .26 and willroll fro'lntherearend .of thisironlto the forward `endtthereof sotlnatfthe spring will practically exert no Ymore tension in the ,position shown in 4.lE4`.-ig ;ure l5 than it will in Figure 2. In other words, nsnthescraper ismovingupward thestone orV oth-er obstruction, .the spring will not be pla ced under. much .gre ater .ten-H siontlhanit washefore andinasmuchas the scrapern supporting frame including' Jthe ba r 12 will Avswing upward upon the :hinges 10a, there is very little'strai-n ,placed upon the iender.

li the traction wheels are imoving in the reverse direction and some obstruction carriedby the wheels striles the scraper, it will turn the section 16 downward upon the ypintile 18. Under thesecirciunstances, however, I

theyole cannot rise Y.because lit bears against Atheshanlr section 22, which in 'turn bears `zngfainst*thestop -bar 39; This downwa rdniovementof the shank section .-16 and of the .scraper will resisted by the relatively is rotatably "mounted upon uWhen it is not necessary or desirable to also the.:scnaper,r`it canibe lti'irnd-upon the `hinge pin 18 and then the latch i0 which turned down over the end of the scraper *shank*15,thus'hoitling the scraper from contact witlnthewheel. -This device cleans the middle lportion of .a tractor wheel tand beT tweenthe lngsland, ot. courseyitfis not adapted Iforvuse where the Vtractor :wheel-ispro-` vided withinudlugs extending-the-ffull width (it Athe wheel. aVl? e have lfound V.in ,practice, however, V.that attire-middle ofthe tractor wheel is :kept clean, .the dirt vhaswavtendency to work toward the .iniddle,2the1eby .leaving the wheel practically clean. lhisfwill-ieave no rutsin the iild when worlring'on loose ground and secures at thesame time the 'full tractive'force of the wheel.

'1f rEhe combination with a tractor wheel and a 'fender therefor, of a :scraper-comprising a supporting framehinged to the fender4 lfor outward swinging movement away fromthe traction wheel, springs on the tender yielding'ly resisting outward movement of the frame, a scraper blade, Ia blade carrying shankpivoted u pon the frame for movemen'tinV a vertical plane and extending beyond vthis Lpivotal axis, a shank section mounted uponthe saine, pivotal a;isand disposed beneath the rearwardlyfprojeeting portiono't the blade shanlna stop limitinglthe upward "movement of "the free "end of the shank section, and acoiletl contractile spring carried*Y u'p'onthe frame 'and 'operatively engaging the shanllr section-to urge .it upward against the stop 'and against 4the rearwardly projecting' 'portion of "the 'shank to lthereby hold the blade Ito its work, and-asprin'g attached to the frame and 'to the vshank and yieldingly resisting downward movement `ot the blade shanka'nd bl'a'de. l K

12. The combination with a tractor wheel and atender rtherei'o'r,of ascralper coinprising a supporting fra le hinged 'to the fender for outward swinging move-mentaw'ayf-rom the traction IWheel, springs on the 'fender yieldingly resisting outward movement oi the frame, a scraper blade,ra blade 0carry-ing shank A,pivoted upon the frame for movement `in a vertical ,plane and extending beyond this pivotal axis, a shank section mounted upon the san epivotal axis land disposedA beneath' the .rearwardly projecting portion of the blade shank,

its bolt may be 'astop limiting fthe :ups

y and to the shank and yieldingly resisting ed upon the yoke and a U-shaped'irondis-- i; terior face of the swing outward ther-efromand projecting bespaced angle irons, angle irons, a`

"ed upon said lpintle, and extending outward` .A a scraper outward beyond the pivotal axis o beneath the bladeshank and ward movement of thefree end of the shank i* section, a coiled contractile the shank ,sec-

spring operativeatfi-ts lower end embracing ly mountedat one end upon the frame, a' yoke carried by the other endrof the springand embracing .the rearwardly projecting -shank section, and a spring attached tothe` frame Y shank section, u a U- haped 'ron' ydisposed loosely between tion, and a contractile spring attached'tosaid supporting frame at its upper end and atcgpwlnward movementof the blade shank and tachedV to a e. 3. llphe combination with a tractor wheelVvv and a fender therefor, of a scraper coacting'V with the tractor wheel and including a frame bar hingedly mounted upon thejexterior of. the fender for outward swinging movement and extending below the fender, springs. re sisting outward movement ofthe frame bar, a supporting frame attached to the frame bar, a blade carrying shankhingedlymount ed upon the supportingframe and carrying blade at one end and :projecting f the shank at its other end, a coiled spring car- Y ried upon the frame and engaging the inner portion of the shank, a shank section hinged upon the pivotal axis of the blade `shank and extending outward .therefrom and against which the outwardly projecting end of the blade shank normally rests, a stop carried by the frame and against which said section bears, a bracket mounted upon thevertically extending frame bar,

" shank .upward. i

andifendenfof a scraper support hingedly attached to the fender, a scraper pivotally mount-eden the lower e ,e d. of the support for swingingmove-ment in the plane of the trac- Ardownfromits normal position, a yspring position but yieldnglypermitting the scrapanl bstacle on the wheel, the scraper being movable in the other'rdirection independently of the spring, and a second spring ylast named direction.

and fender,

attached tothe fender and ynormally depending Vbelow the. same, a, scraper pivotally inountedfon the f lower end ofthe support for swinging movement .in they plane'of.` the tractorrwheelfV and normally extending toa coiledf contractile spring engaged with said bracketa yoke en gaged with the lower end of the spring and embracing the shank section, a roller mountfrom its e normal position, a

v Aup or downI posed between the lower face andthe inner face of the shank section whereby to permit the yoke and spring to shift inward if the scraper blade is'lifted against the action of thelast named spring.

4. The combination ing the scraper support and urging, the scraper support toward the` fender but perf ward under stress, asecond spring mounted with a tractor wheel Yat one endupon er endy ofthe scraper, said'A spring yieldingly 'permitting swingfupward upon engagement withv anobing means lincludingV a downwardly extending frame bar hingedlyconnected to the exfender and adapted to low the fender, a cross bar extending over the frame bar, springs mounted upon the fender and bearing against the cross bar and resisting outward movement of the frame bar,guides mounted on the; fender oneach side of the frame'bar, va supporting frame mounted upon'the lower end of the frame' bar and including downwardly extending:

a pintle connecting said: blade carrying shanky niountthe Jspring, and a second spring yieldably named direction.' u i I v `7. The combinationwith a tractor wheel a verticalpl'ane, a spring supported member. yagainst'` which the' outer end of the scraper bears-` when r the scraper is Vpeiidici-ilar to the wheel rim, Ameans limiting beyond the same, al shank sectionfalso piv-A yoted upon said pintle and extending upward,

normally supporting the same, a `stop mounted uponthe' supporting frameandv engaging the outer` end of the shanksect-ion, a bracket mounted upon' the frame bar, a Vcoiled contractile spring extending' downward between said ported member,the outer-end ofthe scraper being movable upward independently ofthe the wheel engagingend ofthe scraper upf Yward and the outer enddownward against the*` spring supported member whereby said 5; The combination with ak tractor wheel" normally ho d'ngfthe scraper in itsnormal .erfto swing in ,n one vdirection upon striking e yielding,-V lyvresisting movement of; the scraper in the 6. The combination with a tractor wheell of a. scraper support hingedlyr.

ward the wheel, the scraperbeing swingable spring mountedupon'thefender and engag;l

the inner end of thescraper to stacle on the wheel, the scraper l,being mov-f able-,in the other direction independentlyofp andfafendenfof al scraper operatively sup-5 ported on the fender,.. the scraper ybeing piv-V Y oted intermediatel its ends :for movement in,A

substantially per# .the upward movement"` of `the vspring sup,

guidesforthe frame bar and having a .yoke

l tion, a-roller `carried by the yokeV below the tor iwheelQand normally extendingtowardl the wheel, the scraper being swingab-le upy mitting the scraper support to swing out- Y.

the scraper 'support and at and a fender therefor, tractor wheel cleanthe other end operatively engagingthe out# resistingmovement fof the scraper in the last l springv supported member, a', spring urging scraper is normallysnppeited in sposi-tien perpendicular to said w'lieel rim but may `loe shifted against the action of' one or' the ether of sai-d springs to 'permit the passage 0f' a stone. A

'84. The coin-bination with` a tractor` wheel and fender, of ai scraper support attached to' the fender, a scraper vertical plane, a spring` supporte-d member which the outer end of the scraper bears' when the" scraper is substantially per'- pendi'culair to the wheel rim, means limiting' the upward movement of the spring sup- "orted member' Y the enter end of the scraper being movable upward independently 'of thel spring supported member, spring`- urging' the wheel engaging end ef the 'scrapef'iip' ward and the outer end of the scraper' down-4 ward whereby to permit the scraper to be shifted against theV action offone orV the other ofsaid springs on coming in Contact with a stone upon the moyei'n'ent of the wheel in either direction.

9. he combination with a tractor wheel and a fender, of a scraper 'support attached to the fender and etending below lthe same, a scraper pivoted on the support and extending normally in a position approximat'ely perpendicular to the face whereby the scr downward, a spring on theframe operatively el'igaging and yieldingly holding the 'outer end 'of the scraper adainst downward moVeof the tractor wheel ment and the springen the frame operatively engaging and yleldlngly lroldi'ig the inner downward moveer to its normal operative position after th'e scraper has been shifted in either direction. In testimony -whereoi' we herennto'aiix o'nr signatures, Y

'HERMAN HENRY 1ER-AHM.

ARTHUR CAR-L FRHM.

pyloted intermediate its ends n-pen the s-iip'por't for inov'enent-in a aper may move upward or springs acting to return the 

